Make group short name optional

aleksis/core/migrations/0016_make_group_short_name_optional.py

+# Generated by Django 3.0.4 on 2020-03-28 16:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0015_add_import_ref_to_group'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='group',
+            name='short_name',
+            field=models.CharField(blank=True, max_length=16, null=True, unique=True, verbose_name='Short name of group'),
+        ),
+    ]

aleksis/core/models.py

@@ -216,7 +216,7 @@ class Group(ExtensibleModel):
         verbose_name_plural = _("Groups")
 
     name = models.CharField(verbose_name=_("Long name of group"), max_length=60, unique=True)
-    short_name = models.CharField(verbose_name=_("Short name of group"), max_length=16, unique=True)
+    short_name = models.CharField(verbose_name=_("Short name of group"), max_length=16, unique=True, blank=True, null=True)
 
     members = models.ManyToManyField("Person", related_name="member_of", blank=True)
     owners = models.ManyToManyField("Person", related_name="owner_of", blank=True)